Malicious PDF — malware analysis report

Static analysis result for SHA-256 032f14612f43c1fa…

MALICIOUS

PDF

72.8 KB Created: 2021-11-12 08:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1ec5feb459133bdd81794e3cf7cf066e SHA-1: 260f7b9e4c4b6bf66b322fe09f53d68b377588ca SHA-256: 032f14612f43c1fa8c953b1a945b3ef77eef5b6060d9b86ae6f3444761ce22bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm pointing to numerous URLs, many hosted on domains associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis suggest a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://thehideawayresortpattaya.com/userfiles/files/newerudafutowunope.pdf In PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/39602380805.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/gizifuwoferokuwer.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/rexinilizonenatojasu.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/abfbdc8ebe348bc8f8a63aa8490ddb20/fulunazeguzafip.pdfIn PDF document text
    • http://profstil.az/userfiles/file/55630897382.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/79338490327.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/bubibid.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16177b633a11ed---lamegibukaxaditinifa.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616e65b64bfc4---soxagoritukejixare.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/4971395195.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/jojulatidiperijebi.pdfIn PDF document text
    • http://dolgoprudnyj.inhome360.ru/admin/ckfinder/userfiles/files/budazafix.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/fizutemobuzidewivaroroz.pdfIn PDF document text
    • https://majubesar.info/contents/files/22923903505.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/67060074201.pdfIn PDF document text
    • https://kimcert.com/E/file/lakodadobinupovonun.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6d1395ea34109c5d7f04740b77e7cd90/73528925842.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/98766098719.pdfIn PDF document text
    • http://rnralpha.cz/res/file/84609898671.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202110201943533718.pdfIn PDF document text
    • https://rezilta.com/psum/admin/userfiles/file/37934620344.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/woweror.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/7xhmvLXWVJc/uplcv?utm_term=free+simcash+onlinePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2E 10376 bytes
SHA-256: 52dc95a80cb16bbbf121e65ca0ed9645081c149148972a09c2b940b28cbe0a2b
font_01_sfnt_off0000d25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25D 16864 bytes
SHA-256: e2a9c71569cf31bed34c46d7372169665c675434c3733a2eebc4462ec6ebc307
font_02_sfnt_off0000fe67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE67 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef

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